Altiplano: lagoon reflections
Reflected clouds in an altiplanic lagoon in southern Bolivia.
This is the Laguna Verde, so named since it's distinctive in having some green around the edges (I believe). It's very close to the Chilean border, where the Bolivian altiplano begins to drop from about 4,500 metres to the Atacama desert at around the 2,500 metre mark.
Blog posting on just how stunning the Atacama desert and Bolivian Altiplano are.